Oppo A77 5G specs. 1 Oppo A77 5G Smartphone. Internal 128GB 6GB RAM, 256GB 8GB RAM. 2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2. SIM Dual SIM (Nano-SIM, dual stand-by). Factory Unlocked: This Phone works with any International Sim Card.
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